Fig. 2. Percentage of time using the body-caudal fin gait (A) and finbeat frequencies (B) as a function of swimming speed for five triggerfish Rhinecanthus aculeatus. When not using body-caudal undulations, the triggerfish swam using only undulations of the dorsal and anal fins. In B, symbols in blue are frequencies of the dorsal and anal fins during swimming with only these median fins. Symbols in red are the frequencies of the dorsal, anal and caudal fins when body-caudal swimming was used. Total body lengths (L) are given for each individual.